US9626019B2 - Touch panel - Google Patents
Touch panel Download PDFInfo
- Publication number
- US9626019B2 US9626019B2 US14/444,666 US201414444666A US9626019B2 US 9626019 B2 US9626019 B2 US 9626019B2 US 201414444666 A US201414444666 A US 201414444666A US 9626019 B2 US9626019 B2 US 9626019B2
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- US
- United States
- Prior art keywords
- printing layer
- printing
- touch panel
- top surface
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Definitions
- the embodiment relates to a touch panel.
- a touch panel which performs an input function through the touch of an image displayed on a display by an input device such as a stylus pen or a hand, has been applied to various electronic appliances.
- the touch panel may be mainly classified into a resistive touch panel and a capacitive touch panel.
- a resistive touch panel glass is shorted with an electrode due to the pressure of the input device so that a touch point is detected.
- the capacitive touch panel the variation in capacitance between electrodes is detected when a finger of the user is touched on the capacitive touch panel, so that the touch point is detected.
- the repeated use thereof may degrade the performance thereof, and cause scratches. Accordingly, the interest in the capacitive type touch panel representing superior endurance and having a long lifespan is increased.
- the touch panel includes a cover substrate or substrate in which an active area to sense a touch point and an inactive area disposed at a peripheral portion of the active area are defined.
- the inactive area may be printed with a material having a predetermined color to prevent a printed circuit board, through which a wire is connected to an external circuit, from being viewed outside.
- the cover substrate may be coated with black pigments or white pigments so that the printing layer may be formed on the inactive area.
- a transparent electrode layer including a transparent conductive material is formed on the cover substrate or the substrate.
- the cover substrate may have a predetermined step difference by the printing layer formed on the cover substrate.
- the step difference may cause the disconnection or the cracks to a wire electrode when the wire electrode is disposed on the wire electrode.
- the step difference causes a gap in an adhesive layer when the substrate is bonded to the cover substrate by using the adhesive layer. Air is introduced into the adhesive layer through the gap in the adhesive layer when the substrate is bonded to the cover substrate to form an air layer, so that the adhesive strength between the cover substrate and the substrate is degraded. Accordingly, the defective product may be manufactured.
- the embodiment provides a touch panel having improved reliability.
- a touch panel including a cover substrate including an active area and an inactive area, and a printing layer only on the inactive area.
- the printing layer includes a first printing layer, and a second printing layer to surround the first printing layer.
- the second printing layer includes a top surface making contact with the top surface of the first printing layer and a lateral side making contact with a lateral side of the first printing layer.
- the lateral side of the second printing layer has an average inclination angle in a range of about 1.5° to about 2.7° with respect to one surface of the cover substrate.
- the printing layer is formed in the shape of a reverse shape when the printing layer is formed on the inactive area of the cover substrate.
- the printing layer provided on the upper most layer among the first to third printing layers for example, the third printing layer is formed with a width greater than the widths of the first and second printing layers, so that the third printing layer can surround the lateral sides of the first printing layer and/or the second printing layer.
- the width of the second printing layer is greater than that of the first printing layer, the second printing layer can surround the lateral side of the first printing layer.
- the second printing layer surrounds the lateral side of the first printing layer, so that the step difference between the first printing layer and the cover substrate can be reduced.
- the third printing layer surrounds the lateral side of the first printing layer and/or the lateral side of the second printing layer, so that the step difference between the second printing layer and the first printing layer and/or the step difference between the first printing layer and the cover substrate can be reduced.
- the step difference part between the entire portion of the printing layer and the cover substrate can be gently formed.
- the whole thickness of the printing layer can be reduced. Accordingly, additional printing layers such as the fourth and fifth printing layers can be formed, so that the visibility of the touch panel can be improved.
- FIG. 1 is a perspective view showing a touch panel according to the embodiment.
- FIG. 2 is a plan view showing the top surface of the touch panel of FIG. 1 .
- FIG. 3 is a plan view showing another top surface of the touch panel of FIG. 1 .
- FIGS. 4 to 6 are sectional views taken along line A-A′ of FIG. 2 , which shows a printing layer according to the first embodiment.
- FIGS. 7 to 9 are sectional views taken along line A-A′ of FIG. 2 , which shows a printing layer according to the second embodiment.
- FIGS. 10 to 12 are sectional views taken along line A-A′ of FIG. 2 , which shows a printing layer according to the third embodiment.
- FIGS. 13 to 15 are sectional views taken along line A-A′ of FIG. 2 , which shows a printing layer according to the fourth embodiment.
- FIGS. 16 and 17 are sectional views taken along line A-A′ of FIG. 2 , which shows a printing layer according to the fifth embodiment.
- FIGS. 18 and 19 are sectional views showing various types of touch panels according to various embodiments.
- each layer or film
- each region each pattern or each structure shown in the drawings
- the size of each of the elements does not utterly reflect an actual size.
- a touch panel may include a cover substrate 100 , a sensing electrode 200 and a wire electrode 300 disposed on the cover substrate 100 , and a printed circuit board 400 connected to the wire electrode 300 .
- the cover substrate 100 may include glass or plastic.
- the cover substrate 100 may include tempered glass, half-tempered glass, sodalime glass, reinforced plastic, or flexible plastic.
- the cover substrate 100 may include an active area AA and an inactive area UA.
- the active area AA refers to an area through which a touch instruction may be input by a user.
- the inactive area UA refers to an area to which the touch instruction is not input because the inactive area UA is not activated even if the touch of the user is input thereto.
- sensing electrodes 200 may be disposed in the active area AA of the cover substrate 100 and wire electrodes 300 may be disposed in the inactive area UA of the cover substrate 100 .
- the sensing electrode 200 may be disposed on the cover substrate 100 .
- the sensing electrode 200 may be disposed in the active area AA on the cover substrate 100 .
- the sensing electrode 200 may include first and second electrodes 210 and 220 .
- the first sensing electrode 210 may extend in the first direction on the active area AA of the cover substrate 100 .
- the first sensing electrode 210 may be disposed on one surface of the cover substrate 100 .
- the second sensing electrode 220 may extend in a second direction on the active area AA of the cover substrate 100 .
- the second sensing electrode 220 may be disposed on one surface of the cover substrate 100 while extending in a direction different from the extending direction of the first sensing electrode 210 .
- the first and second sensing electrodes 210 and 220 may be disposed on the same surface of the cover substrate 100 .
- sensing electrode of one of the first and second sensing electrodes 210 and 220 may be connected to each other through a connection part 230 .
- An insulating layer 250 may be further disposed on the cover substrate 100 .
- the insulating layer 250 may cover the first and second sensing electrodes 210 and 220 .
- a bridge electrode 240 is formed on the insulating layer 250 so that the sensing electrodes, which are not connected to each other through the connection part, can be connected to each other.
- the first and second sensing electrodes 210 and 220 may be disposed on the same surface, that is, one surface of the active area AA together without the contact between the first and second sensing electrodes 210 and 220 .
- the sensing electrodes 200 may be disposed on the bridge electrode 240 and the insulating layer 250 .
- one of the first and second sensing electrodes 210 and 220 is disposed on the insulating layer 250 so that the first and second sensing electrodes 210 and 220 may be connected to each other through the connection part, and the other of the first and second sensing electrodes 210 and 220 is disposed on the bridge electrode 240 , so that the first and second sensing electrodes 210 and 220 may be connected to each other through the bridge electrode 240 .
- the wire electrode 300 may be electrically connected to the first and second sensing electrodes 210 and 220 .
- the wire electrode 300 may be disposed on the inactive area AA of the cover substrate 100 and electrically connected to the first and second sensing electrodes 210 and 220 .
- the wire electrode 300 may include a first wire electrode 310 connected to the first sensing electrode 210 and a second wire electrode 320 connected to the second sensing electrode 220 .
- the wire electrode 300 may include a conductive material.
- the wire electrode 300 may include a metallic material such as copper (Cu) or silver (Ag), but the embodiment is not limited thereto.
- the wire electrode 30 may include a transparent conductive material such as indium tin oxide (ITO).
- the wire electrode 300 may receive a sensed touch signal from the sensing electrode 200 , and may transmit the touch signal to a driving chip 410 mounted on the printed circuit board 400 , which is electrically connected to the wire electrode 300 , through the wire electrode 300 .
- the wire electrode 300 may be connected to the sensing electrode 200 extending from the active area AA to the inactive area UA.
- the sensing electrode 200 may be connected to the top surface or the bottom surface of the wire electrode 300 .
- the printed circuit board 400 may be disposed on the inactive area UA.
- the printed circuit board 400 may include a flexible printed circuit board (FPCB).
- the printed circuit board 400 may be connected to the wire electrode 300 disposed on the inactive area UA.
- the printed circuit board 400 may be electrically connected to the wire electrode 300 on the inactive area UA.
- the printed circuit board 400 may have the driving chip 410 mounted thereon.
- the driving chip 410 may receive the touch signal sensed by the sensing electrode 200 from the wire electrode 300 to perform an operation according to the touch signal.
- the above-described wire electrode 300 is disposed on the inactive area UA of the cover substrate 100 .
- the wire electrode 300 is disposed on a printing layer 500 disposed on the inactive area UA of the cover substrate 100 .
- the printing layer 500 may be disposed on the inactive area UA so that the wire electrode 300 disposed on the cover substrate is not viewed.
- the printing layer 500 may be transparent, semi-transparent, or opaque. In this case, the transparent printing layer views an electrode disposed thereon on a cover substrate.
- the opaque printing layer prevents the electrode disposed thereon on the cover substrate from being viewed by naked eyes of a person.
- the semi-transparent printing layer partially views the electrode disposed thereon on the cover substrate.
- the printing layer 500 of the touch panel may include first and second printing layers 510 and 520 .
- the first printing layer 510 may be disposed on the cover substrate 100
- the second printing layer 520 may be disposed on the first printing layer 510 .
- the first and second printing layers 510 and 520 may be semi-transparent, or opaque.
- the first and second printing layers 510 and 520 may be colored opaque printing layers.
- the first and second printing layers 510 and 520 may have at least one of black, white, and blue.
- the first and second printing layers 510 and 520 may extend from one end of the inactive area UA to an opposite end of the inactive area UA.
- the first and second printing layers 510 and 520 may extend from one end of the inactive area UA to the opposite end of the inactive area UA forming the boundary surface with the active area AA.
- the first and second printing layers 510 and 520 may have a predetermined width on the inactive area UA.
- the first and second printing layers 510 and 520 may be disposed with a predetermined width on the inactive area UA while extending from one end of the inactive area UA to the opposite end of the inactive area UA forming the boundary surface with the active area AA.
- the second printing layer 520 may have a width W2 wider than a width W1 of the first printing layer 510 .
- the first printing layer 510 may be defined by a top surface 511 and a lateral side 512 of the first printing layer 510 .
- the top surface 511 of the first printing layer 510 may refer to a surface substantially parallel to one surface of the first printing layer 510 making contact with the cover substrate 100 .
- the lateral side 512 of the first printing layer 510 may refer to a surface inclined with respect to the top surface 511 of the first printing layer 510 while extending from the top surface 511 of the first printing layer 510 .
- the second printing layer 520 may surround the first printing layer 510 .
- the second printing layer 520 may dispose the top surface 511 and the lateral side 512 of the first printing layer 510 .
- the second printing layer 520 may make contact with the top surface 511 and the lateral side 512 of the first printing layer 510 .
- the second printing layer 520 may be defined by a top surface 521 and a lateral side 522 of the second printing layer 520 .
- the second printing layer 520 may be defined by the top surface 521 of the second printing layer 520 making contact with the top surface 511 of the first printing layer 510 and the lateral side 522 of the second printing layer 520 making contact with the lateral side 512 of the first printing layer 510 .
- the lateral side 522 of the second printing layer 520 may have a predetermined inclination with respect to one surface 101 of the cover substrate 100 .
- the lateral side 522 of the second printing layer 522 may be inclined at an average inclination angle ⁇ of about 3° or less with respect to the one surface 101 of the substrate 100 .
- the lateral side 522 of the second printing layer 520 may be inclined at an inclination angle ⁇ of about 1.5° to about 3° with respect to the one surface 101 of the substrate 100 .
- the lateral side 522 of the second printing layer 520 may be inclined at an average inclination angle ⁇ of about 1.5° to about 2.7° with respect to the one surface 101 of the substrate 100 .
- the average inclination angle of less than about 1.5° may not be formed due to the process characteristic.
- the sensing electrode and the wire electrode extending from the active area AA to the inactive area UA are cracked at the inclined area of the printing layer so that the reliability of the sensing and wire electrodes may be degraded.
- the average inclination angle of the lateral side 522 of the second printing layer 500 with respect to the one surface 101 of the cover substrate 100 may refer to an inclination angle formed between a virtual line, which connects a boundary line between the one surface 101 of the cover substrate 100 and the lateral side 522 of the second printing layer 520 to a boundary line between the lateral side 522 of the second printing layer 520 and the top surface 521 of the second printing layer 520 , and the one surface 101 of the cover substrate 100 .
- the printing layer 500 may have a predetermined thickness.
- the height H that is, the vertical height from one surface of the cover substrate 100 to the top surface of the printing layer 500 may be about 20 ⁇ m or less.
- the height H that is, the vertical height from the one surface of the cover substrate 100 to the top surface of the printing layer 500 may be in the range of about 15 ⁇ m to about 20 ⁇ m.
- the wire electrode 300 may be disposed on the printing layer 500 .
- the wire electrode 300 may be disposed on the top surface of the second printing layer 520 .
- the wire electrode 300 may be connected to the sensing electrode 200 through a pad part 430 on the top surface of the second printing layer 520 , and may extend to the inactive area UA in which the printed circuit board 400 is located so that the wire electrode 300 may be connected to the printed circuit board 400 .
- a passivation layer may be further disposed on the top surface of the second printing layer 520 .
- the passivation layer may be disposed on the top surface of the second printing layer 520 while surrounding the wire electrode 300 except for the pad part 430 .
- the passivation layer protects the wire electrode from the outside to protect the wire electrode 300 from being oxidized and damaged.
- the touch panel according to the first embodiment may further include a reinforcing printing layer 540 on the printing layer 520 .
- the reinforcing printing layer 540 may be disposed on the top surface of the second printing layer 520 .
- the reinforcing printing layer 540 may have a width wider than or narrower than that of the second printing layer 520 .
- the reinforcing printing layer 540 may have a width narrower than that of the second printing layer 520 , the reinforcing printing layer 540 may be disposed on the top surface of the second printing layer 520 . As shown in FIG. 6 , if the reinforcing printing layer 540 may have a width wider than that of the second printing layer 520 , the reinforcing printing layer 540 may be disposed on the top surface and the lateral side of the second printing layer 520 to surround the second printing layer 520 .
- the wire electrode 300 and the passivation layer on the printing layer 500 may be disposed on the reinforcing printing layer 540 .
- the reinforcing printing layer 540 may be semi-transparent, or opaque. In addition, if the reinforcing printing layer 540 has an opaque color, the reinforcing printing layer 540 may have a color different from those of the first and second printing layers 510 and 520 .
- FIGS. 7 to 15 a printing layer of a touch panel according to various embodiments will be described with reference to FIGS. 7 to 15 .
- the structure or the elements the same as or similar to those of the touch panel according to the first embodiment described above will not be further described, and the same reference numerals will be assigned to the same elements.
- a printing layer of a touch panel according to the second embodiment may include first to third printing layers 510 , 520 , and 530 .
- the first to third printing layers 510 to 530 may be sequentially disposed on one surface of the cover substrate 100 , that is, the inactive area UA.
- the first to third printing layers 510 to 530 may be disposed with widths different from each other.
- the width W2 of the second printing layer 520 may be greater than the width W1 of the first printing layer 510 .
- the width W3 of the third printing layer 530 may be narrower than the width W2 of the second printing layer 520 .
- the second printing layer 520 may surround the first printing layer 510 , and the third printing layer 530 may be disposed on the second printing layer 520 .
- the second printing layer 520 may surround the top surface 511 and the lateral side 512 of the first printing layer 510
- the third printing layer 530 may be disposed on the top surface 521 of the second printing layer 520 .
- the second printing layer 520 may make contact with the top surface 511 and the lateral side 512 of the first printing layer 510
- the third printing layer 530 may make contact with the top surface 521 of the second printing layer 520 .
- the lateral side 522 of the second printing layer 520 may have a predetermined inclination with respect to one surface 101 of the cover substrate 100 .
- the lateral side 522 of the second printing layer 520 may be inclined at an average inclination angle ⁇ of about 3° or less with respect to the one surface 101 of the substrate 100 .
- the lateral side 522 of the second printing layer 520 may be inclined at an average inclination angle ⁇ of about 1.7° to about 2.9° with respect to the one surface 101 of the substrate 100 .
- the average inclination angle of less than about 1.7° may not be formed due to the process characteristic.
- the sensing electrode and the wire electrode extending from the active area AA to the inactive area UA are cracked at the inclined area of the printing layer so that the reliability of the sensing and wire electrodes may be degraded.
- the printing layer 500 may have a predetermined thickness.
- the height H that is, the vertical height from one surface of the cover substrate 100 to the top surface of the printing layer 500 may be about 20 ⁇ m or less.
- the height H that is, the vertical height from the one surface of the cover substrate 100 to the top surface of the printing layer 500 may be in the range of about 15 ⁇ m to about 20 ⁇ m.
- the wire on the printing layer may be viewed at the outside. If the height H, that is, the vertical height from one surface of the cover substrate 100 to the top surface of the printing layer 500 is more than about 20 ⁇ m, the whole thickness of the touch panel may be increased due to the height of the printing layer 500 .
- the first to third printing layers 510 to 530 may have a predetermined thickness.
- the height H1 that is, the vertical height from one surface of the cover substrate 100 to the top surface of the first printing layer 510 may be in the range of about 5 ⁇ m to 7 ⁇ m.
- the height H2, that is, the vertical height from the top surface of the first printing layer 510 to the top surface of the second printing layer 520 may be in the range of about 5 ⁇ m to 7 ⁇ m.
- the height H3, that is, the vertical height from the top surface of the second printing layer 520 to the top surface of the third printing layer 530 may be in the range of about 5 ⁇ m to 7 ⁇ m
- the first to third printing layers 510 to 530 may have an equal thickness or mutually different thicknesses within the above range. If the thicknesses of the first to third printing layers 510 to 530 are less than about 5 ⁇ m, the wire on the printing layer may be viewed at the outside. If the thicknesses of the first to third printing layers 510 to 530 are more than about 7 ⁇ m, the whole thickness of the touch panel may be increased due to the height of the printing layers.
- the reinforcing printing layer 540 may be further disposed on the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface 521 of the third printing layer 530 .
- the reinforcing printing layer 540 may have a width wider than or narrower than that of the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface of the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface and the lateral side of the third printing layer 530 to surround the third printing layer 530 .
- the reinforcing printing layer 540 may be semi-transparent, or opaque. In addition, if the reinforcing printing layer 540 has an opaque color, the reinforcing printing layer 540 may have a color different from those of the first to third printing layers 510 to 530 .
- a printing layer of a touch panel according to the third embodiment may include the first to third printing layers 510 to 530 .
- the touch panel according to the third embodiment may have the third printing layer 530 having the width wider than those of the first and second printing layers 510 and 520 .
- the width W2 of the second printing layer 520 may be wider than the width W1 of the first printing layer 510
- the width W3 of the third printing layer 530 may be wider than the width W2 of the second printing layer 520 .
- the second printing layer 520 may surround the top surface 511 and the lateral side 512 of the first printing layer 510
- the third printing layer 530 may surround the top surface 521 and the lateral side 522 of the second printing layer 520 .
- the lateral side 532 of the third printing layer 530 may have a predetermined inclination with respect to one surface 101 of the cover substrate 100 .
- the lateral side 532 of the third printing layer 530 may be inclined at an average inclination angle ⁇ of about 3° or less with respect to the one surface 101 of the cover substrate 100 .
- the lateral side 532 of the third printing layer 530 may be inclined at an average inclination angle ⁇ of about 1.7° to about 2.9° with respect to the one surface 101 of the cover substrate 100 .
- the average inclination angle of less than about 1.7° may not be formed due to the process characteristic.
- the sensing electrode and the wire electrode extending from the active area AA to the inactive area UA are cracked at the inclined area of the printing layer so that the reliability of the sensing and wire electrodes may be degraded.
- the reinforcing printing layer 540 may be further on the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface 531 of the third printing layer 530 .
- the reinforcing printing layer 540 may have a width wider than or narrower than that of the third printing layer 530 .
- the reinforcing printing layer 540 may have a width narrower than that of the third printing layer 530 , the reinforcing printing layer 540 may be disposed on the top surface 531 of the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface 531 and the lateral side 532 of the third printing layer 530 to surround the third printing layer 530 .
- a printing layer of a touch panel according to the fourth embodiment may include the first to third printing layers 510 to 530 .
- the width W2 of the second printing layer 530 is narrower than the width W1 of the first printing layer 510
- the width W3 of the third printing layer 530 may be greater than the width W1 of the first printing layer 510 and the width W2 of the second printing layer 520 .
- the third printing layer 530 may surround the top surface 521 of the second printing layer 520 , and the lateral side 512 of the first printing layer 510 .
- the lateral side 532 of the third printing layer 530 may have a predetermined inclination with respect to one surface 101 of the cover substrate 100 .
- the lateral side 532 of the third printing layer 530 may be inclined at an average inclination angle ⁇ of about 3° or less with respect to the one surface 101 of the substrate 100 .
- the lateral side 532 of the third printing layer 530 may be inclined at an average inclination angle ⁇ of about 1.7° to about 2.9° with respect to the one surface 101 of the substrate 100 .
- the average inclination angle of less than about 1.7° may not be formed due to the process characteristic.
- the sensing electrode and the wire electrode extending from the active area AA to the inactive area UA are cracked at the inclined area of the printing layer so that the reliability of the sensing and wire electrodes may be degraded.
- the reinforcing printing layer 540 may be further on the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface 531 of the third printing layer 530 .
- the reinforcing printing layer 540 may have a width wider than or narrower than that of the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface of the third printing layer 530 .
- the reinforcing printing layer 540 may be disposed on the top surface 531 and the lateral side 531 of the third printing layer 530 to surround the third printing layer 530 .
- the wire electrode 300 may be disposed on the printing layer 500 .
- the wire electrode 300 may be disposed on the top surface 531 of the third printing layer 530 .
- the wire electrode 300 may be connected to the sensing electrode 200 through the pad part 430 on the top surface of the third printing layer 530 , and may extend to the inactive area UA in which the printed circuit board 400 is located so that the wire electrode 300 may be connected to the printed circuit board 400 .
- the sensing electrode may be provided on the upper surface or the lower surface of the wire electrode and may be connected to the wire electrode through the pad part.
- the sensing electrode may extend along the lateral side of the second printing layer so that the sensing electrode may be connected to the wire electrode.
- the sensing electrode may extend along the lateral side of the second printing layer or the third printing layer, so that the sensing electrode may be connected to the wire electrode.
- a passivation layer may be further disposed on the top surface 531 of the third printing layer 530 .
- the passivation layer may be disposed on the top surface 531 of the third printing layer 530 while surrounding the wire electrode 300 except for the pad part 430 .
- the passivation layer protects the wire electrode from the outside to protect the wire electrode 300 from being oxidized and damaged.
- the wire electrode and the passivation layer on the printing layer may be disposed on the reinforcing printing layer 540 .
- a touch panel according to the fifth embodiment may include a printing layer having a conductive area EA formed therein.
- the printing layer may include first and second printing layers 510 and 520 , and the wire electrode 300 and the sensing electrode 200 may be disposed on the printing layer.
- the sensing electrode 200 and the wire electrode 300 may be electrically connected to each other through the conductive area EA formed on the printing layer.
- the wire electrode 300 may be disposed on the second printing layer 520 , and the sensing electrode 200 may be interposed between the first and second printing layers 510 and 520 .
- a conductive area EC may be formed on the second printing layer 520 . Accordingly, the sensing electrode 200 may be connected to the wire electrode 300 through the conductive area EC.
- the sensing electrode 200 may be disposed on the second printing layer 520 , and the wire electrode 300 may be interposed between the first and second printing layers 510 and 520 .
- the conductive area EC may be formed on the second printing layer 520 . Accordingly, the sensing electrode 200 and the wire electrode 300 may be connected to each other through the conductive area EC.
- the embodiment is not limited thereto.
- the third printing layer may be additionally disposed on the second printing layer, and the wire electrode or the sensing electrode may be interposed between the first and second printing layers or the second and third printing layers.
- the wire electrode and the sensing electrode may be electrically connected to each other through the conductive area formed on the second printing layer and/or the third printing layer.
- the thickness of the printing layer can be more reduced as compared with the thickness of the printing layer according to the related art.
- the third printing layer surrounds the step difference part between the first printing layer and the second printing layer, the whole thicknesses of the printing layer can be reduced.
- additional printing layers such as fourth and fifth printing layer can be disposed on the third printing layer.
- the step difference can be reduced between the printing layers provided in the inactive area of the cover substrate.
- the printing layers can be provided in the shape of a reverse step, thereby reducing the step difference between the printing layers.
- a printing layer provided on the upper most top surface for example, the second printing layer or the third printing layer is formed with the widest width, and the second printing layer or the third printing layer surrounds the lateral side of the first printing layer and/or the second printing layer, respectively, so that the whole printing layers have in the shape of a reverse step, thereby reducing the step difference between the printing layers.
- the electrodes can be prevented from being shorted and cracked due to the step difference between the printing layers, so that the reliability and the efficiency of the touch panel can be improved.
- the whole thicknesses of the printing layers can be reduced by gently reducing the step difference between the printing layers.
- another printing layer can be additionally formed on the printing layer. The visibility of the touch panel can be improved.
- FIGS. 18 and 19 another type of touch panel according another embodiment will be described with reference to FIGS. 18 and 19 .
- the structure or the elements the same as or similar to those of the touch panel described above will not be further described, and the same reference numerals will be assigned to the same elements.
- the touch panel according to another embodiment further includes a substrate 600 provided on the cover substrate 100 .
- the substrate 600 may include plastic.
- the substrate 600 may include polyethylene terephthalate (PET).
- the cover substrate 100 may be bonded to the substrate 600 through an adhesive layer.
- the cover substrate and the substrate 600 may be bonded to each other through the adhesive layer including an optical clear adhesive.
- the cover substrate 100 and the substrate 600 include an active area and an inactive area.
- the active and inactive areas have the same meanings as those described above.
- a first sensing electrode 210 may be disposed in the active area of the cover substrate 100 .
- the first wire electrode 310 connected to the first sensing electrode 210 may be disposed in the inactive area of the cover substrate 100 .
- a second sensing electrode 220 may be disposed in the active area of the cover substrate 600 .
- the second wire electrode 320 connected to the second sensing electrode 220 may be disposed in the inactive area of the substrate 600 .
- first and second wire electrodes 310 and 320 may be electrically connected to the printing circuit board 400 .
- the cracks in the electrode described above can be prevented so that the reliability of the touch panel can be improved, and the adhesive strength between the cover substrate and the substrate can be improved.
- the step difference between the printing layers of the cover substrate can be reduced. Accordingly, in order to bond the substrate onto the cover substrate, the gap resulting from the step difference between the adhesive layer, which is disposed between the cover substrate and the substrate, and the printing layer can be reduced.
- a touch panel according to still another embodiment further includes first and second substrate 610 and 620 disposed on the cover substrate 100 .
- the first and second substrates 610 and 620 may include plastic.
- the first and second substrates 610 and 620 may include PET.
- the cover substrate 100 , the first substrate 610 , and the second substrate 620 include active and inactive areas.
- the active and inactive areas have the same meanings as those described above.
- the first sensing electrode 210 may be disposed in the active area of the first substrate 610 .
- the first wire electrode 310 connected to the first sensing electrode 210 may be disposed in the inactive area of the first substrate 610 .
- the second sensing electrode 220 may be disposed in the active area of the second substrate 620 .
- the second wire electrode 320 connected to the second sensing electrode 220 may be disposed in the inactive area of the substrate 600 .
- first and second wire electrodes 310 and 320 may be electrically connected to the printed circuit board 400 .
- the adhesive strength between the cover substrate and the substrate can be improved.
- the step difference between the printing layers of the cover substrate can be reduced. Accordingly, in order to bond the substrate onto the cover substrate, the gap resulting from the step difference between the adhesive layer, which is disposed between the cover substrate and the substrate, and the printing layer can be reduced.
- any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
- the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- Push-Button Switches (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20130113526A KR20150033468A (ko) | 2013-09-24 | 2013-09-24 | 터치 패널 |
KR10-2013-0113526 | 2013-09-24 |
Publications (2)
Publication Number | Publication Date |
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US20150085204A1 US20150085204A1 (en) | 2015-03-26 |
US9626019B2 true US9626019B2 (en) | 2017-04-18 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/444,666 Expired - Fee Related US9626019B2 (en) | 2013-09-24 | 2014-07-28 | Touch panel |
Country Status (5)
Country | Link |
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US (1) | US9626019B2 (fr) |
EP (1) | EP2851769B1 (fr) |
KR (1) | KR20150033468A (fr) |
CN (1) | CN104461116B (fr) |
TW (1) | TWI557612B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160034078A1 (en) * | 2014-07-31 | 2016-02-04 | Lg Innotek Co., Ltd. | Touch device |
US10606391B2 (en) * | 2017-01-11 | 2020-03-31 | Innolux Corporation | Touch display device |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103576952B (zh) * | 2012-07-24 | 2017-04-19 | 宸鸿科技(厦门)有限公司 | 触控面板 |
KR102098386B1 (ko) * | 2013-10-24 | 2020-04-07 | 엘지이노텍 주식회사 | 터치 패널 |
KR102187911B1 (ko) * | 2013-11-13 | 2020-12-07 | 엘지이노텍 주식회사 | 터치 패널 |
WO2016159422A1 (fr) * | 2015-04-03 | 2016-10-06 | 이엘케이 주식회사 | Couvercle transparent pour dispositif électronique |
US11106298B2 (en) * | 2017-11-30 | 2021-08-31 | Yungu (Gu'an) Technology Co., Ltd. | Touch display panels and touch display devices |
CN110069151A (zh) * | 2018-01-24 | 2019-07-30 | 宸鸿科技(厦门)有限公司 | 触控面板 |
CN108874214B (zh) * | 2018-05-25 | 2021-05-04 | 业成科技(成都)有限公司 | 触控面板结构 |
WO2020071181A1 (fr) * | 2018-10-03 | 2020-04-09 | 浜松ホトニクス株式会社 | Filtre d'interférence de fabry-perot |
KR20200062435A (ko) * | 2018-11-26 | 2020-06-04 | 삼성디스플레이 주식회사 | 윈도우 패널, 이를 포함하는 표시 장치 및 그 제조 방법 |
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- 2014-08-22 EP EP14181917.7A patent/EP2851769B1/fr not_active Not-in-force
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Also Published As
Publication number | Publication date |
---|---|
EP2851769A2 (fr) | 2015-03-25 |
KR20150033468A (ko) | 2015-04-01 |
US20150085204A1 (en) | 2015-03-26 |
TW201512941A (zh) | 2015-04-01 |
CN104461116A (zh) | 2015-03-25 |
EP2851769A3 (fr) | 2015-08-05 |
EP2851769B1 (fr) | 2019-01-02 |
TWI557612B (zh) | 2016-11-11 |
CN104461116B (zh) | 2018-04-27 |
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